Promoted File#path to IO#path, added path: optional param to IO#new #4106

Job	Run time
build native	48m 20s
ruby/spec on CRuby 3.0	4m 27s
ruby/spec on CRuby 3.1	4m 52s
lint	21m 0s
build jvm	11m 39s
ruby/spec on CRuby 3.2	3m 46s
fast specs	2m 35s
test integration	13m 5s
specs :truffle	12m 49s
specs :language :core	18m 57s
specs :library :cext :security :command_line :tracepoint	12m 1s
run MRI tests on native	6h 0m 15s
test native	3m 31s
	8h 37m 17s

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